/*
 * Copyright (C) 2012 CyberAgent
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.jarlen.photoedit.filter.blend;

import android.opengl.GLES20;

public class GPUImageMixBlendFilter extends GPUImageTwoInputFilter
{

	private int mMixLocation;
	private float mMix;

	public GPUImageMixBlendFilter(String fragmentShader)
	{
		this(fragmentShader, 0.5f);
	}

	public GPUImageMixBlendFilter(String fragmentShader, float mix)
	{
		super(fragmentShader);
		mMix = mix;
	}

	@Override
	public void onInit()
	{
		super.onInit();
		mMixLocation = GLES20.glGetUniformLocation(getProgram(),
				"mixturePercent");
	}

	@Override
	public void onInitialized()
	{
		super.onInitialized();
		setMix(mMix);
	}

	/**
	 * @param mix
	 *            ranges from 0.0 (only image 1) to 1.0 (only image 2), with 0.5
	 *            (half of either) as the normal level
	 */
	public void setMix(final float mix)
	{
		mMix = mix;
		setFloat(mMixLocation, mMix);
	}
}
